cron problem

From: Shlomo Solomon (shlomo.solomon_at_nonexisting.hamakor.org.il)
Date: Mon 23 Jan 2006 - 21:36:00 IST


Hi again

I did a clean install of Mandriva2006 on my machine and although, on the
whole, it went well, I have had a few minor problems. Although I solved most
of them, there are still a few that I can't seem to solve.

Here is one such problem:

In cron.hourly there are 5 jobs. None of them are **heavy**, but cron seems to
finish only after 50 minutes.

cron.hourly runs at 1 minute past the hour. Here's the relevant line
from /etc/crontab:

# run-parts
01 * * * * root nice -n 19 run-parts /etc/cron.hourly

Here are the jobs in cron.hourly (I added the first and last for testing):

[solomon_at_shlomo1 ~]$ ls -la /etc/cron.hourly
total 49
drwxr-xr-x 2 root root 328 Jan 23 19:58 ./
drwxr-xr-x 244 root root 17384 Jan 23 19:35 ../
-rwxrwxr-x 1 root root 296 Jan 23 19:53 aaaa-test-hourly*
-rwxr-xr-x 1 root root 279 Jan 23 19:56 hylafax*
lrwxrwxrwx 1 root root 14 Jan 13 14:46 msec -> /usr/sbin/msec*
-rwxr-xr-x 1 root root 324 Jan 23 19:57 sysstat*
lrwxrwxrwx 1 root root 27 Jan 19 22:26 zz-myechotest
-> /data1/myscripts/myechotest*

I added "debugging code" similar to the following to the end of each of the
above scripts:

## first we test echo
echo " this script is " $0
echo "**** this is a test of the echo command in a CRON job ****"

## now mail to solomon
echo "hylafax-hourly is mailing to solomon" | mail -s "hylafax-hourly solomon"
solomon

At 1 mnute past the hour, I get 5 e-mails (one from each of the above jobs),
but only at 51 minutes past the hour, I get an e-mail from cron itself
including the output of the 5 echo lines.

Note that the "debugging code" is at the end of each script, so I assume that
should rule out the possibility that one of the jobs is actually running for
50 minutes. I also looked at the output of ps -A and top and didn't see
anything unusual.

According to the mail log in /var/log/mail/info, 5 e-mails are being sent at
1 minute past the hour and 1 is being sent at 51 minutes past the hour (just
as I'm receiving them). For readability, I marked each of the 6 e-mails in
the log with ----->, but nothing else was changed.

----->Jan 23 20:01:00 shlomo1 postfix/pickup[25600]: 56BED8ECD: uid=0
from=<root>
Jan 23 20:01:00 shlomo1 postfix/cleanup[10110]: 56BED8ECD:
message-id=<20060123180100.56BED8ECD_at_shlomo1.solomon>
Jan 23 20:01:00 shlomo1 postfix/qmgr[8546]: 56BED8ECD:
from=<root_at_shlomo1.solomon>, size=469, nrcpt=1 (queue active)
----->Jan 23 20:01:00 shlomo1 postfix/pickup[25600]: 5BB018ECC: uid=0
from=<root>
Jan 23 20:01:00 shlomo1 postfix/cleanup[10110]: 5BB018ECC:
message-id=<20060123180100.5BB018ECC_at_shlomo1.solomon>
Jan 23 20:01:00 shlomo1 postfix/local[10112]: 56BED8ECD:
to=<solomon_at_shlomo1.solomon>, orig_to=<solomon>, relay=local, delay=0,
status=sent (delivered to mailbox)
Jan 23 20:01:00 shlomo1 postfix/qmgr[8546]: 56BED8ECD: removed
Jan 23 20:01:00 shlomo1 postfix/qmgr[8546]: 5BB018ECC:
from=<root_at_shlomo1.solomon>, size=473, nrcpt=1 (queue active)
Jan 23 20:01:00 shlomo1 postfix/local[10112]: 5BB018ECC:
to=<solomon_at_shlomo1.solomon>, orig_to=<solomon>, relay=local, delay=0,
status=sent (delivered to mailbox)
Jan 23 20:01:00 shlomo1 postfix/qmgr[8546]: 5BB018ECC: removed
----->Jan 23 20:01:00 shlomo1 postfix/pickup[25600]: A58C78ECD: uid=0
from=<root>
Jan 23 20:01:00 shlomo1 postfix/cleanup[10113]: A58C78ECD:
message-id=<20060123180100.A58C78ECD_at_shlomo1.solomon>
Jan 23 20:01:00 shlomo1 postfix/qmgr[8546]: A58C78ECD:
from=<root_at_shlomo1.solomon>, size=481, nrcpt=1 (queue active)
----->Jan 23 20:01:00 shlomo1 postfix/pickup[25600]: AA5C28ECC: uid=0
from=<root>
Jan 23 20:01:00 shlomo1 postfix/cleanup[10110]: AA5C28ECC:
message-id=<20060123180100.AA5C28ECC_at_shlomo1.solomon>
Jan 23 20:01:00 shlomo1 postfix/local[10112]: A58C78ECD:
to=<solomon_at_shlomo1.solomon>, orig_to=<solomon>, relay=local, delay=0,
status=sent (delivered to mailbox)
Jan 23 20:01:00 shlomo1 postfix/qmgr[8546]: A58C78ECD: removed
Jan 23 20:01:00 shlomo1 postfix/qmgr[8546]: AA5C28ECC:
from=<root_at_shlomo1.solomon>, size=469, nrcpt=1 (queue active)
----->Jan 23 20:01:00 shlomo1 postfix/pickup[25600]: B64A18ECB: uid=0
from=<root>
Jan 23 20:01:00 shlomo1 postfix/cleanup[10113]: B64A18ECB:
message-id=<20060123180100.B64A18ECB_at_shlomo1.solomon>
Jan 23 20:01:00 shlomo1 postfix/local[10112]: AA5C28ECC:
to=<solomon_at_shlomo1.solomon>, orig_to=<solomon>, relay=local, delay=0,
status=sent (delivered to mailbox)
Jan 23 20:01:00 shlomo1 postfix/qmgr[8546]: AA5C28ECC: removed
Jan 23 20:01:00 shlomo1 postfix/qmgr[8546]: B64A18ECB:
from=<root_at_shlomo1.solomon>, size=463, nrcpt=1 (queue active)
Jan 23 20:01:00 shlomo1 postfix/local[10112]: B64A18ECB:
to=<solomon_at_shlomo1.solomon>, orig_to=<solomon>, relay=local, delay=0,
status=sent (delivered to mailbox)
Jan 23 20:01:00 shlomo1 postfix/qmgr[8546]: B64A18ECB: removed
----->Jan 23 20:51:00 shlomo1 postfix/pickup[12999]: A2EEB8EBF: uid=0
from=<root>
Jan 23 20:51:00 shlomo1 postfix/cleanup[21618]: A2EEB8EBF:
message-id=<20060123185100.A2EEB8EBF_at_shlomo1.solomon>
Jan 23 20:51:00 shlomo1 postfix/qmgr[8546]: A2EEB8EBF:
from=<root_at_shlomo1.solomon>, size=1079, nrcpt=1 (queue active)
Jan 23 20:51:00 shlomo1 postfix/local[21620]: A2EEB8EBF:
to=<solomon_at_shlomo1.solomon>, orig_to=<solomon>, relay=local, delay=0,
status=sent (delivered to mailbox)
Jan 23 20:51:00 shlomo1 postfix/qmgr[8546]: A2EEB8EBF: removed

So what's happening to delay cron from sending that mail?

BTW, I have a similar (but not identical) problem in cron.daily but am not
giving details now since maybe a soution to the hourly problem will help
solve the daily problem.

-- 
Shlomo Solomon
http://the-solomons.net
Sent by KMail (KDE 3.4.2) on LINUX Mandriva 2006
=================================================================
To unsubscribe, send mail to linux-il-request_at_linux.org.il with
the word "unsubscribe" in the message body, e.g., run the command
echo unsubscribe | mail linux-il-request_at_linux.org.il


This archive was generated by hypermail 2.1.7 : Mon 23 Jan 2006 - 21:47:58 IST